Drawing and rolling machine



May 7, 1929.

BARNHART DRAWING AND ROLLING MACHINE 4 Sheets-Sheet Fjiled Oct. 5, 1926 May 7, 1929. G. E. BARNHART 1 DRAWING AND ROLLING MACHINE Filed 001:. 5, 1926 4 Sheets-Sheet y 1929- G. E. BARNHART DRAWING AND RQLLING MACHINE Filed Oct. 5, 1926 4 Sheets-Sheet 5 l4 M JI/TO/i 6.501%: 5.8 HRNHHRT fi f7 Tram/5v y 7, 1929- G. E. BARNHART 1,

DRAWING AND ROLLING MACHINE Filed 00L 5, 1926 4 Sheets-Sheet Patented May 7, 1929.-

PATENT OFFICE.-

GEORGE E. BARNHART, OF PASADENA, CALIFORNIA.

iinawme Am). ROLLING MACHINE.

Application filed Oetober 5, 1926. Serial No. 139,558.

It is an object of this invention to pro-.

vide a machine suitable for use in the drawing of tubes or rods; and it isa particular object of my present invention to provide means permitting .an automatic reversal of movement of a carriage or come-along.

It is a further object of my invention to provide means whereby such reversing movement may be efiected either manually or automatically. I

It is afurther object of my inventlon to provide means favorable to the use of man'- drels or other interior forming elements Within tubes, during a drawing operatlon or during a combined drawing and'irolling'operation. a

It is a further object of my invention to provide drawing (or drawing-and-rolling) means favorable to the use of rotatable die elements',,-especially rotatable die elements provid d with uniform or varying peripheral channels; and embodiments of my 1n-' vention may comprise means whereby a closing action between die elements is'gradually efi'ected during one movement of a rod, tube or the like between said dies, a reverse movement thereof being accompanied by a cor-' responding openin movement of. said dies. It is a further o'ject of my invention.- to

. provide an organization of the general char-- acter' referred to which is suitable for use either in the drawing of cylindrical rods or tubes (uniform in dlameter) or in he production of tapered eil'ects in rodsor tubes; and preferred embodiments of my invention may comprise means permitting either manual or automatic closing (and/oriopem ing) of dies, during the advance and/or retraction of stock therebetween.

Other objects of my invention may be best appreciated from the following description of an illustrated embodiment thereof, taken in connection with'theappended claims and accompanying drawings, in whichf Fig. 1 may be referred to as a general planview, with parts broken away.

Fi 2 is a side elevational view correspon ing to Fig. 1, as viewed from the direction of the arrow 2 but with parts elimi nated or broken away. Y

= Fig. 3- 's atransverse sectional ,view, on

a slightly enlarged scale, taken substantially as indicated by the broken line 33 of Fig.

1, parts being brokenaway and an alternative type of drawing head being shown. 1

Fig. 4 is a detailed longitudinal section, taken substantially as indicated by the line 4-4 of Fig. 1, but slightly enlarged, parts being broken away.

Fig. 5 is a detailed view, showing anal- I ternative and manually operable mechanism which may be capable of substitution for gears shown in Fig. 1, for controlling the opening and/or closing movement of dies. Fig. 6 is a diagram comparable with the righthand portion of Fig. 2, but showing an alternatlve arrangement of gears, thearv rangement shown in Fig. 6 being such as to effect a drawing without 'rolling,the ripheral movement of rotatable diesbeing opposite tothe advance of the stock therethrough. 4

Fig. 7 may be referred to as a diagrammatic horizontal section illustrating. a rolling operation in which one or more interior formers are used, within tubular stock and inconjunction with a plurality of pairs of rotatable dies, in the. elongation of tubes, the forms shown being adapted to produce a substantially cylindrical and considerably elongated tube.

Fig. 8 is a diagram illustrating the efi'ect produced by a first pair of die rollers operating as illustrated in Fig. 7. (See line 8-8 of said figure.) i Fig. 9 is a view comparable with Fig. '8, {gut takensubstantially as indicated by the me 99 of Fig. 7.. Fig. 10- is a top plan detail view, showing a type of die head which may contain j filjig. 14., is a transverse sectional View Referring to the details of that specific embodiment of my invention illustrated in Figs.

1, 2, 3 and 4, a mainframe 11 is shown as comprising longitudinally extending channel or flanged members 12, 12' and 13, 13,- the latter members being disposed below and I s aced apart somewhat more widely than e former. Although details of frame construction may be regarded as comparatively immaterial, I show the mentioned longitudinal members as supported by uprights 14, restingupon floor membeps 15 and as braced bydiagonals 16, 16'; andI show laterall' projectlng subsidiary frames 17 and 17 (for the sup ort of shafts and additional parts'hereina er mentioned), as comprising dia onals 18 and 18'.

Ilpon or near one end of a frame of the general character referred to I may removably su port adie head 19, or 19) preferably o a special construction, comprising rotatable dies, as hereinafter described; and,

in orderto manipulate a tubular or other stock, drawing the same through the mentioned head, I may employ means such as a so-called come-along 20, movable parallel with and between the mentioned longitudinal frame members by means such as a sprocket chain 21. The chain 21 is shown as extending over sprocket wheels 22 and 23 respectively secured upon shafts 24 and 25,-

' one of these shafts beingrotated by any suitable power means. 4

For the/purpose last referred to, I may, for example, spline upon a sleeve 25, shown as coaxial with the shaft 25 a double-faced 'aw clutch member 26, laterally movable, as

y meansof a lever 27, into engagement with either a corresponding jaw 28 upon a pulley 29 orsinto engagement with a jaw 30 upon a pulley 31,-b oth of-said pulleys being presumably in continuousrotation (as by belts, not shown) and one of side pulle s (as, by the ulley 29), being secured to t e sleeve 25. his sleeve is shown as provided with agear (32) in a train by which rotation may be imparted to shaft 25. For example, assuming the pulley 31 to be rotated in the direction indicated by the arrow 31, and the'p'ulley 29'to be rotated in the direction indicated by the arrow 29', (and [the mentioned pulleys each to becapable of idle rotation, except when their clutch faces are er'gaged by the corresponding faces of clutch. 2

to get a drawing effect, 2.6- may engage 30, and to get a reversing or stock-returning through gears 33 and 34 (on shaft 35) to the 7 gear 36,also secured on the mentloned shaft 25; and, if desired, the lever '27 may be provided not only with a forwardly extending handle 37 but with additional means, com rising links 38 and 39, permitting manipu ation thereof, from a near or remote point or points, by either or both manual and/or automatic means.

To provide for an automatic shifting of the lever 27, orits equivalent, this lever being shown as pivoted at 40,. the come-along 20.: (alternative forms of come-along being shown in Figs. 11 to 15, as more particularly described hereinafter), comprisingjaws (not shown in Figs. 1-4 inclusive) in what I may term the gripping end'41 thereof, may include side members or links 42, 42' and a block 43; and the latter may be provided with a chain-engaging hook H (releasable by sprocket 21, to'prevent over-running) and with an upstanding projection or post 44, apertured to'receive a tappet-carrying rod 45, which is capable of limited longitudinal movement and may be provided or connected with any suitable means for manipulating the link 39 or its equivalent, to shift the reverse lever 27.

' On the rod 45, or its equivalent, I may adjustably secure tappets 46 and 47, suitably spaced apart and alternatively engageable by the post 44,-the effect of enga ement of tappet 47, being a longitudinal shift of the rod (shown as extending through guides G, G) in t e direction of the arrow 48 and -a correspon ing translatory movement of a substantially parallel rod or link 49, shown as connected therewith by a clamp member 50 (permitting relative adjustment) and as adapted to transmit movement to link 39 by way of alever 51, pivoted at 52 on a bracket or brackets 53, 53 and supported by the main frame 11.

' In orderthat the reverse lever 27 shall reliably remain in one or the other of two extreme positions to which it may be shifted by engagement of the post 44 with tap et 46 or tappet 47, the lever 51 ma be providbd with a third arm 54, upon whic is shown an apertured member 55 through which extends a rod 56 which is pivotedto a bracket 57,

rigidly secured to the frame 11, and is surrounded by a compression spring 58; and, in order to facilitate a manual shifting of the lever 27' by an operatiye standing in the vicinity oftgt 'e 19, or its equivalent, I inay connect:the-mentioned link 38' with I an arm 59, rigidly secured upon a longitudinally "extending shaft 60, having bearings at 61 and 62, the forward end 63 of this shaft being shown as provided with an arm or 'handle 64.

In the employment of an organization of the general character described for the e1ongation of metallic tubes,- with any desired thinning, toughening and/or taperm ,effect, I may employ mandrels within sai tubes, or I may use internal forming means of the general character best illustrated-in Fig. 7.

the same to or rendering the same integral with a tension member or rod 68,shown as threaded at 69 for the reception of nuts 70 and 71 and as adapted to be dropped within a notch 72 in any suitable fixed member such as a transversely extending vertical plate 7.3.

All features of my invention, although capable of various modes of use, are suitable to be used with die heads comprising rotatable dies; and, although referred forms of die head constitute the su ject matter of my copending application mentioned, it is an important feature of my present invention that it provides means for engaging and advancing tubular or other stock, optionally returning the same to an original position relatively to rotatable dies disposed in pairs or sets, one pair or set of rotatable dies being disposed immediately in advance of another and in a novel, cooperative relationship thereto,areas of contact of said pairs or sets being preferably overlapped in an advantageous manner, substantially as in-' dicated, with exaggeration, in Figs. 8 and 9.

From. an inspection of the figures referred to it will be seen that each set oftwo opposing dies reaches part way around the article, and that the dies collectively reach all the way around, with some overlapping.

For example, in addition to the mentioned dies 66, 66 (which may be assumed to be disposed in a horizontal plane) I may employ one or more cooperating pairs, such as the rotatable dies 74, 74', shown as disposed in a plane at right angles to the plane of the dies 66, 66'; and I may interpose between the last mentioned pair or'set of dies an additional interior bulbous forming element 7 5,-shown as integrally connected with the mentioned interior forming element 67. As stated in my mentioned copended application, in case substantially circular crosssectional outlines are desired, the die elements referred to may advantageously provide peripheral grooves whose cross-sectional outline corresponds, in the bottom thereof, to the arc of a circle or circles; and, assuming that the cross-sectional outline of the article being drawn is to be changed and v the article elongated (with a corresponding effect in the thinning and toughening of its walls) the action of the first-encountered pair of dies (66, 66) may be substantially that indicated in Fig. 8,-lateral regions 76,

76 being given an accurate cylindrical form (either by a drawing or a combined drawing or rolling effect) whereas intermediate areas 77,77 are momentarily thickened and caused to protrude. 'The action of the second or subsequently-encountered pair of dies 74is, however, such as toiron out the intermediate areas 77, 77', producing a substantially perfect cross-sectional outline, although presumably leaving very slight lateral clearances, as to favorable to the removal of the tube or work W from an internal forming element M (whether a mandrel or bulbous enlargement of the general character illustrated in Fig: 7). It will be understood that the cross-sectional out line of any mandrel or other interior forming, whether circular or non-circular, must approximately correspond with the crosssectional outline of the grooves'in the dies used therewith.

Although I may use a come-along 20 of any preferred character, in case a cylindrical product is to be produced by the advance and return of tubular stock through pairs or sets of dies of the general character described, I consider it advantageous to employ a come-along of the general character illustrated in Fig. 11,this cQmeealong comprising, in additiontothe' side members 42, 42 and the block 43 carrying post 44, a pair of peripherally roughened cams or grip-eifecting eccentrics 78, 78' secured bypivot 79, 79' extending through plates 80,

80 at the gripping end 41 thereof. In order to adapt this come-along to use both for pushing and pulling a tube or rod, I show the plates 42, 42 as interconnected by an integral transverse web, 81; and I show the eccentrics 78, 78 as provided with arms 82, 82', interconnected by tension spring 83,-

-to prevent automatic release of said rod or tube, although permitting manual release thereof by a movement of separation of said arms.

For use in rather light work, employing comparatively short mandrels and dispensing with the spring 83, I may, as illustrated in Fig. 12, pivot ovoidal cam elements or eccentrics 78 78", as by means of pins 79*; 79, to a floating block 80*, relying upon an engagement of arms 82*, 82 integral with said cams and extending through slots in side plates 42 42 ',-his come-along being adapted to effect an automatic release, upon 'a reversal of the direction of its movement.

The come-along illustrated in Figs. 13, 14 and 15 is specifically constructed for use inheavy work and in taper-drawing,'as by means involving the use of die-closing and opening devices best illustrated in Figs. 1 and 2,details of die head construction be ing more particularly described and claimed in my mentioned copending application. As in the mentioned forms of come-along, I may employ a block 43 carrying a post 44 but the side plates 42", 42* are shown as separately pivoted to said block and as pivoted also to grip-effecting members 7 8 7 8 pivotedrespectively at 79 and at 79 to a floating block 80". This floating block is however shown as provided witha conical aperture 84", adapted to receive a set of correspondingly tapered wedge members 85 ,the latter being shown as four in number, to apply pressure from all sides and as provided with interior circumferential grooves 86, adapted to receive springs 87*, fdr the automatic expansion thereof, whenever such expansion is permitted by the retraction of arms 88", 88 comprised in the members 78 and 7 8.

If desired, in order to keep the mentioned wedges in their intended relationships and in order to provide for the automatic retraction of the same at the end of a return movement, (this come-along being, suitable for use on thin stock, with or without a mandrel) the ends thereof may project within and carry a loosely fitting ferrule 89*, adapted to be engaged by any fixed stop (as, by a transversely extending plate or frame member 90, Fig. 1)each rod or tube being, in this case, inserted through said ferrule, to be gripped, between said wedges, upon the initiation of a drawing movement, and removed upon its return to the initial position.

When dies are to be opened and/or closed during drawing (or drawing and rolling) movements I may utilize (see Figs. 1, 2 and 16) the rotation of any suitable shaft (as, the shaft 24, carrying sprocket wheel 22 over which sprocket chain '21 extends) to effect the purpose referred to. For example, providing the shaft 24 with a gear 91, (as by means comprising a shock avoiding spring S) and interposing an idler 92, I may drive a'gear 93 upon a shaft 94 in the direction indicated by arrow 95, employing the rotation of the shaft 94 to impart the closing and opening movement, in any preferred manner, to suitable dies, as by means, comprisin additional gears 96 (on shaft 94,) 96 on a parallel shaft 94' carrying a die element 74') 97 (also on shaft 94) 97 (on a parallel shaft and integral with a bevel gear 98)-the latter engaging a cooperating bevel gear 98', onfa shaft 98 carrying a die 66*. r

The shaft 94 is shown as carrying a die 74, mating with the die 74 and the'shaft 98 of the bevel gear 98' may be provided not only with the die 66' but with a gear 98, intermeshing with a gear 98, by which a shaft 98*, carrying a die 66*, to mate with the die 66 may be correspondingly but opject to automatic or manual control n the general manner described.

The generalmode of operation of my invention having been fully indicated in connection with the foregoing description of parts thereof, I' call attention to the fact that lubrication of mandrels and/or stockmay be effected by any suitable means, as by circulation of a suitable oil through pipes 99 and 100 by means such as a small electric motor 101, an oil reservoir being shown at 102 (with which the mentioned plate 73 may be rigidly connected) ;.and, in case a manual adjustment of die pressure is preferred to the described automatic control thereof, it will be obvious that, as suggested in Fig. 5, the described removable gear 95, may be replaced by means such as a lever or rotating handle provided'with means such as a socket shaft 94, adapted to be secured coaxially of the mentioned shaft 94 by means such as a key or set screw 103.

I mention in conclusion that the die head 19 (or 19) is intended to be provided with means for effecting a movementofapproach between the bottoms of channels in its contained dies, for a closing effect (whether or not the channels therem are uniform in depth) and, in the case of the head 19, this approach may be effected by a rotation-of the component dies either in the direction in which the stock is advanced, or in an opposite direction; and, accordingly, I may substitute for the gear arrangements illustrated in Figs. 1 and 2 an alternativearrangement of the general character diagrammatically suggested in Fig. 6,the gear, 93 being, in this case, rotated in a direction opposite to the gear 24' by means comprising an internal gear 92', with which an additional gear 92", engaging gear 93 connected.

I show the head 19 as provided with adjusting screws A which may be manipulated either manually or by gears (not shown) thereon, said gears being retainable by pins (not shown) extending through the openings O in said screws; and a self-centering effect may be obtained by some provision for may be rigidly,

a free transverse play of the respective dies,the non-intersecting shafts thereof being preferably placed in as close proximity as is consistent with the avoidance of engagement therebetween; but it should be understood both that the principles ofmy invention are applicable to the production of either circular or non-circular products (whether uniform or non-uniform in crosssection), and that, inv case I gear together two or more sets of dies all provided with peripheral channels varying in depth, a first)- encountered set of dies must be given an angular advance, relatively to subsequentlyencountered dies, such that the opening between the bottoms of channels in the lastmentioned dies may be, at the time of their action upon a given line or area, substantially the same (in the drawing of, for example, a tapered product having various cross-sections) as the openin previously existent between the bottom 0 channels in ,the first-encountered dies, at the time when the latter engaged said line or area. Thus,

although Figs. 8 and 9 may be read as perti-' new; to the drawing of a tapered product,

they are not, in that case, to be regarded as simultaneous views.

Although I have herein described a single complete organization embodying my invention, suggesting-various alternatives as to subordinate parts and alternative modes of operation, it should be understood not only that various features of my invention might be independently employed but also that additional modifications might be readily devised by those skilled in the arts to which this case relates,without involving the slightest departure from the scope of my invention, as the same is indicated in the above and following claims.

I claim as my invention:

1. In an organization of the general char- \acter described: dies; driving means for said moving means, a clutchmember controlling the direction of movement of said driving means; means for releasably engag-. ing stock to be subjected to the action of said dies; means for moving said engaging means relatively to said dies; and means for effecting a reversal of said moving means;- said reversing means comprising a longitudinal member which is slidable relatively to said engaging means and is provided with tappets movable by a member connected with said engaging means arranged to move said clutch member into neutral position; and spring tension means for continuing the movement of said longitudinal member after movement thereof by said en gaging means.-

2. In an organization of the general character described: dies; means for releasably engaging stock to be subjected to the action of said dies; means for moving said engagacter described: dies; means for releasably.

engaging stock to be subjected to the action of said dies;'means for moving said engaging means relatively to said dies and automatic means including a tension member for effecting a reversal of said moving means,

said reversing means being subject to independent manual control.

4. In an organization of the general character described: dies; means for releasably engaging stock to be subjected to the action of said dies; means for moving said engaging means relatively to said dies; and automatic means including a spring tension member for eflectlng a reversal of sa1d movmg means, sa1d reversing means to be subject to independent manual control from I either of a plurality of points.

acter described: rotatable dies; means for releasably engaging stock to be subjected to 5. In an organization ofthe general c'hartheaction of said-dies; traveling means for moving said engaging means-relatively to saiddies; driving means'for said traveling means; means operated b said driving means for rotating said ice and means predetermining a limit of movement of said traveling means.

6. In an organization of the general character described: dies; gear means for positively rotating the same; means for releasably engaging stock to be subjected to the action of sa1d dies; traveling means for moving said engaging means relatively to said dies; driving means for said traveling means, means operated by said drivin means for operating said gear means; and means predetermining a limit of movement of said traveling means,said dies being disposed in sets, one set in advance of an other, and some of said dies being provided with peripheral channels.

7. In an organization of the general character described: dies; gear means for positively rotating the same; means for releasably engaging stock to be subjected to the action of said dies; traveling means for moving said engaging means relatively to said dies; driving means for said traveling means, means operated by said drivin means for operating saidgear means; an means predetermining a limit of movement of said traveling means,said dies being disposed in sets, one set in advance of another, and some of said dies being provided character described: dies; gear means ment of said last mentioned means,said,

dies beingdisposed in sets, one set in advanceiof another, the dies of successive sets being overlapped as to their areas of engagement of said stock.

9. In an organization of the general character described: rotatable dies; means for releasably engaging stock to be subjected to the action of said dies; traveling means for moving said engaging means relatively to said dies; driving means for said traveling means, means operated by said driving means for rotating said dies; and means coinprising a tappet-carrying rod, predetermining a limit 0 movement of said traveling means,said engaging means being in the form of a so-called come-along comprising side members spaced apart and pivotally connected with a block which is provided with means for engaging said tappet-carrying rod." v i 10. In an organization of the general character described: rotatable dies; means for releasably engaging stock to be subjected to the action of said dies; traveling means I for moving said engaging means relatively to said dies; driving means for said traveling means, means operated by said driving means for rotating said dies; and means, comprising a ta pet-carrying rod, predetermining a limit 0 movement of said traveling means,said engaging means being in the form of a so-called come-along comprising side members spaced apart and pivotally connected with a"--block which is provided with means for engaging said'tappet-carryin rod,'and comprising alsopivotally mov-' ab e members operative fora Q ripping effect.

11. In an or anization oftlie general character describe rotatable dies; means for releasably engaging stock to be subjectedto the action of said dies; traveling means'for movin said engaging means relatively to said dies; driving means for said traveling means, means operated by said driving means for rotating said dies; and means, comprising a tap t-carrying rod, predetermining a limit 0 movement of said traveling means,said engaging means being in the form of a so-called come-along comprising side members spaced apart and pivotally connected with a block which is provided with means for engaging said tappet-carrying rod, and comprising also pivotally movable members operative for a gripping eifect, said last mentioned members being pivoted to a part which is disposed between said side,

members.

12. In an organization of a general character described, airs of dies provided with peripheral ring 0 annels means whereby the opening between the bottoms of said "channels may be varied during rotation thereof,

traveling means for drawing stock through said dies, driving means for said traveling means; and means operated by said driving means whereby said dies maybe rotated oppositely to the direction in which said stock is advanced.

13. In an organization for drawing the tubular stock: a pluralityof sets of rotatable dies, said sets being disposed one in ad- Vance of another; and means for varying the rotative adjustment of said dies with the movement and in the same direction as the movement of stock therebetween.

14. In a drawing organization: a pluralit of sets of. rotatable dies disposed one in a Vance of another, said. sets bein provided with means for assuring a pre etermined relative movement thereof to one another; and means for drawing stock through said dies at a predetermined rate of travel ir- "gespective of the rate of rotation of said 1es.

' 3 In testimony whereoflI have hereunto set my hand at Los Angeles, California, this 30th day of September, 1926;

GEORGE E. BARNHART. 

